Gasolene-engine.



L. P. VANCE.

GASULENE ENGINE.

APPLICATION FILED SEPT.21,1912.

Patented Mar. 17, 1914.

2 SHEETBSHBET 1.

AIR PHE' AIR INTAKE 49 17 g. 1

MR BUFFER J EXHAUST l/VVE/VTOR LEO F'VANCE TO VALVE CAMSHAFT lV/TNESSES2 SHEETS-SHEET 2.

L. P. VANCE.

GASOLENE ENGINE.

APPLICATION FILED SEPT.21,1912.

Patented Mar. 17, 1914.

To all whom it may concern LEO 1?. VANCE, OF ROCK ISLAND, ILLINOIS.

GASOLENE-ENGINE.

Specification of Letters Patent.

Patented Mar. 17, 19.1.4.

Application filed September 21, 1912, Serial No. 721,596.

Be it known that I, LEO P. VANCE, a citizen of the-United States,residing at Rock Island, in the county of Rock Island and Stateof-Illinois, have invented certain new and useful Improvements inGasolenc-Engines, of which the following is a specification, referencebeing had therein to the accompanying drawing.

This invention relates to internal combustion motors, and has specialreference to a two cycle internal combustion motor arranged to operatein connection with an automatic fuel pump.

The principal object of the invention is to improve the efiiciency andeconomy of the internal combustion motor.

The second object of the invention is to provide means for injectingfuel into the cylinder at the moment ignition takes place for thepurpose of doing away witlrthe trouble of premature ignition.

The third object of this invention is to dispense with timing gears andexhaust valves.

With the above and other objects in view this invention consists ingeneral of certain novel constructions, combinations and arrangement ofparts'as will be hereinafter fully described, illustrated in theaccompanying drawings, and specifically claimed.

In the accompanying drawings, like characters of reference indicate likeparts in the several views, and :Figure 1 is a vertical section takenthrough the engine constructed in accordance with this invention, cer-'tain of the parts being shown in elevation.

Fig. 2 is a horizontal section through the upper part of the engine.Fig. 3 is an en Ia-rged detail view of the compression pis-. ton and itsparts. Fig. 4 is a detail horizontal section partly broken away throughthe compression piston.

In carrying out the objects of this invention, there is provided a crankcasing lO'of the closed type, and in this crank casing is journaled acrank shaft 11 having the usual crank 12 which is connected by means ofa piston rod 13 with the pin 14 of a piston-15. This piston is of theusual hollow type and works in a cylinder ltl'surrounded by a wa-. terjacket 17. ()n the top of the cylinder 16 formed at the lower ispositioned an auxiliary cylinder 18 having the usual water jacket 1.),and the bottom of this cylinder 18 is provided with an inwardlyextending flange 20. The cylinder 18 carries the head 21 wherein is astuffing box 22 provided with a packing 23. Thi stuffing box 29. isclosed in by a cap 24; secured to the cylinder head by suitable bolts25. The head 21 is provided with a downwardly extending flange 26 havingan interior diameter equal to the interior diameter of the head andstuffing box, and slidably mounted in the head of the stalling boxandthe flange is a piston 27 which is formed integrally with a piston 28by preference, the latter working in the cylinder 18. Both the piston 2Sand the piston 27 are hollow as shown clearly in Fig. 3, and through thewalls of the piston 27 extend openings 29 which communicate withthcchamber 30 formed in the hollow piston 27 and with a chamber 31surrounding said hollow piston.

The lower end of the piston 28 is provided with an opcnin forming abarrel seat 32 wherein is seated a valve 33 provided with a stem 34which extends upward in the upper end of the piston 27 passing through aseptum The upper end of this valve stem 34 is surrounded by a coilspring 36, and above the spring is provided a collar 37 secured by acotter pin 38. The spring 36 bears at one end against the septum 35 andat the other end against the collar 37 so that the valve is normallyheld closed. Access is had to the collar and spring by means of a plug39 fitting in the threaded opening of the upper end of the piston 27.

The crank casing is provided with a port 40 from which leads apa....,agc 41 which has its upper end conru ted tr a port 42 givingaccess to the chamber 31. A check valve 41 is provided so that air maybe drawn into the crank casing. This check valve is of the usual typeand comprises a perforated casing forming a rest for one end of thespring yieldably holding the inwardly opening valve stem in a closedposition.

On top of the cap 24 is a valve casing -13 which opens into the cap, aseat 44- being end of said opening. A valve 45 is arranged to rest onthis seat when the valve is closed, and is provided with a 28 it willforce piston stem 416 extending upward through the Valve casing andhaving on its upper end a collar -17 between which and the casing is aspring 18 so that the valve is normally closed. An air intake opening 19is made in the valve casing to admit air thereto, and the cap '24: isprovided with a port which is connected by a pipe 51 with a port 52formed on the casing 53 of the mixing. valve, the'latter being providedwith the usual needle valve operated by means of the bell crank leverarrangement 55 which is connected by a reach rod 56 to the valvecamshaft. The mixing valve casing is likewise provided with a port 57 towhich is connected the ipe 58 leading from the supply of gas or The pipe'58 is provided with a check valve to prevent back flow of gas from thevalve casing to the gas supply. The cylinder 16 is provided intermediateits ends with the exhaust ports 59, and these ports may or may not beconnected to suitable exhaust pipes, as preferred.

In the operation of this device the first instroke draws into thecrank-case air only through the check valve (not given on drawing) andcompresses air in the cylinder 16 and below pistons 28 and 27 forcingthem up, compressing air above piston 27 It is tobe noted since the areaof piston 28 is greater than that of piston 27, the pressure abovepiston 27 is greater than the compressuitable sionor explosive pressurein cylinder 16 and.

below piston 28. Now as piston .15 reaches a point just before deadcenter fuel admission valve 5% opens and sprays air mixed with the fuelin mixing valve casing 53. Now as no great amount offuel is-in thecylinder 16 at one time, the burning of the fuel will not be in thenature of an explosion; but will last as long as there is fuel in mixingvalve casing 58; and valve 54 is open, about one tenth of the forwardstroke. The method of burning is'similar to a gas burner, the supply andamount of fuel entering the mixing valve casing 53 may be regulated bychoking air intake 19., As piston 15 reaches the position shown in Fig.1

the explosion takes place then piston 15 will descend on the out strokeand compress the air that is in the crank-casing 10, passage 4C1, 12 andin chamber 31. \Vhen piston 15 reaches a point about 10 before itreaches dead. center the exhaust 59 starts to open. Now as the pressurein cylinder 16 falls below the pressure in crank-casing 10, air passageall and chamber 31 and above piston 28 down till ports 29 in piston 27fall below flange 26, it will then enter ports 29 and chamber 30. Now atthis time the valve 33 opens and this air flows inward assisting in thescavenging of cylinder 16; as pistons 27 and 28 descend it forms avacuum above piston 27 and in air pipe 51 and in. mixing valve-casing 53the ike.

drawing in fresh air through valve 45 and a. small quantity of fuel intomixing valve casing 53 ready for the next cycle.'

Having thus described the invention, what I is claimed as new, 1s

1. An engine comprising a casing, a lower cylinder above said casing anupper cylinder above said lower cylinder, the partition between saidcylinders being perforated to permit communication between said cylinsders, a hollow cap for said upper cylinder, a piston head slidablymounted in said lower cylinder, a crank shaft passing through saidcasing, a link connecting said crank shaft with said piston head, apiston head. slidably mounted in said upper cylinder and provided with ahollow core extending into said hollow cap, a valve in said core fornormally closing an opening in the bottom thereof, the upper portion ofsaidcore being provided with perforations for permitting access to theinterior thereof, means for permitting communication between said casingand said upper cylinder, and means for'in-i troducing fuel into theupper portion of said lower cylinder. 7

2. An engine comprising a casing, a lower cylinder positioned above saidcasing and communicating positioned above said lower cylinder andcommunicating therewith, acollar extending inwardly from the upper wallof said upper cylinder formed therein, a hollow cap closing an openingformed in the wall of said upper cylinder, a piston head slidablymounted in said upper cylinder and provided with an extension adapted toclose the opening permitting communication between said upper and lowercylinders when said upper piston is in :1. lowered position,a hollowcore in said upper cylinder extending through said collar into saidhollow cap, a valvev controlling an opening formed in the bottom of saidpiston, the walls of said core being pro vided with inlet openings, apipe permitting communication between said casing and the upper portionof said upper cylinder, a crank shaft passing through said casing, apiston in said lower cylinder, a piston rod connecting said crank shaftwith said last mentioned piston, and means for introducing fuel lntosaid lower cylinder above said last mentioned piston' i 3. An enginecomprising a casing, a lower cylinder above said casing, anupper-cylinder above said lower cylinder, a cover plate for said uppercylinder provided with a central opening, an inwardlyextending collarclosing said opening, a hollow cap covering said opening, a hollowpiston in said upper cylinder, a core in said piston extending throughsaid collar into said hollow cap, a partition in said core, the lowerportion o said core being provided with a plurality o therewith, anupper cylinder and closing an opening openings adjacent said partitionand with an opening in its end, a valve for closing the opening in theend of said core, a stem extending from said valve through saidpartition, a spring surrounding said slein above said partition andengaging H1O same for normally holding said valve in a elosed position,a piston in said lower cylinder, operat ing means for said lower piston,and means for permitting eomn'iunicaeion between said 1' easing and saidupper cylinder.

In tesllmumy whereof I. hereunto aflix my. signature in 1n-esenee of twowitnesses.

LEO P. VANCE. Wibnesses:

IIENHY JEPIGNS, RUBY bioR'roN.

